Asus P5Q-VM User Manual - Page 32

Memory configurations - overclock

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1.7.2 Memory configurations You may install 512 MB, 1 GB, 2 GB, and 4 GB non‑ECC, unbuffered, DDR2 DIMMs into the DIMM sockets. • Due to chipset behavior, to obtain memory frequency higher than DDR2 800, you can manually adjust DRAM Frequency in BIOS settings. Refer to 2.4 Ai Tweaker menu for details. • For DRAM Frequency configuration options in relation to FSB Frequency settings, see page 2-19 for details. • You may install varying memory sizes in Channel A and Channel B. The system maps the total size of the lower-sized channel for the dual-channel configuration. Any excess memory from the higher-sized channel is then mapped for single-channel operation. • It is recommended to install the memory modules from the yellow slots for better overclocking capability. • Always install DIMMs with the same CAS latency. For optimum compatibility, it is recommended that you obtain memory modules from the same vendor. • When installing total memory of 4GB capacity or more, Windows® 32-bit operation system may only recognize less than 3GB. Hence, a total installed memory of less than 3 GB is recommended. • This motherboard does not support memory modules made up of 256 Mb chips. • Due to chipset limitation, this motherboard can only support up to 16 GB on the operating systems listed below. You may install a maximum of 4 GB DIMMs on each slot. 64-bit Windows® XP Professional x64 Edition Windows® Vista x64 Edition • The default memory operation frequency is dependent on its SPD. Under the default state, some memory modules for overclocking may operate at a lower frequency than the vendor-marked value. To operate at the vendormarked or at a higher frequency, see section 2.4 Ai Tweaker menu for manual memory frequency adjustment. • The memory modules may require a better cooling system to work stably under full loading (4 DIMMs) or overclocking setting. 1-20 Chapter 1: Product introduction

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1-20
Chapter 1: Product introduction
1.7.2
Memory configurations
You may install 512 MB, 1 GB, 2 GB, and 4 GB non-ECC, unbuffered, DDR2
DIMMs into the DIMM sockets.
•
Due to chipset behavior, to obtain memory frequency higher than DDR2
800, you can manually adjust
DRAM Frequency
in BIOS settings. Refer to
2.4 Ai Tweaker menu
for details.
•
For
DRAM Frequency
configuration options in relation to
FSB Frequency
settings, see page 2-19 for details.
•
You may install varying memory sizes in Channel A and Channel B. The
system maps the total size of the lower-sized channel for the dual-channel
configuration. Any excess memory from the higher-sized channel is then
mapped for single-channel operation.
•
It is recommended to install the memory modules from the yellow slots for
better overclocking capability.
•
Always install DIMMs with the same CAS latency. For optimum
compatibility, it is recommended that you obtain memory modules from the
same vendor.
•
When installing total memory of 4GB capacity or more, Windows
®
32-bit
operation system may only recognize less than 3GB. Hence, a total
installed memory of less than 3 GB is recommended.
•
This motherboard does not support memory modules made up of 256 Mb
chips.
•
Due to chipset limitation, this motherboard can only support up to 16 GB
on the operating systems listed below. You may install a maximum of 4 GB
DIMMs on each slot.
•
The default memory operation frequency is dependent on its SPD. Under
the default state, some memory modules for overclocking may operate at a
lower frequency than the vendor-marked value. To operate at the vendor-
marked or at a higher frequency, see section
2.4 Ai Tweaker menu
for
manual memory frequency adjustment.
•
The memory modules may require a better cooling system to work stably
under full loading (4 DIMMs) or overclocking setting.
64-bit
Windows
®
XP Professional x64 Edition
Windows
®
Vista x64 Edition